Descrição

Draws a cubic Bezier curve from the current point to (x,y) using absolute
coordinates. The first control point is assumed to be the reflection of the
second control point on the previous command relative to the current point.
(If there is no previous command or if the previous command was not an
DrawPathCurveToAbsolute, DrawPathCurveToRelative,
DrawPathCurveToSmoothAbsolute or DrawPathCurveToSmoothRelative, assume the
first control point is coincident with the current point.) (x2,y2) is the
second control point (i.e., the control point at the end of the curve).
At the end of the command, the new current point becomes the final (x,y)
coordinate pair used in the polybezier.